5-Alkylidene-2-halo-4-substituted-2-cyclopentenone and process for production thereof
申请人:TEIJIN LIMITED
公开号:EP0131441A2
公开(公告)日:1985-01-16
Novel 5-alkylidene-2-halo-4-substituted-2- cyclopentenone and process for production thereof. The novel 5-alkylidene-2-halo-4-substituted-2-cyclopentenones are represented by the following formula (I):
wherein Ra represents a substituted or unsubstituted aliphatic hydrocarbon group having 1 to 12 carbon atoms or a substituted or unsubstituted phenyl group, Rb represents a substituted or unsubstituted aliphatic hydrocarbon group having 1 to 12 carbon atoms, and X represents a halogen atom. The novel cyclopentenones possess excellent pharmaceutical activities including anti-tumor activity, antiviral activity and antimicrobial activity.
Novel conjugated cyclopentenones, 5-alkylidene-4-hydroxy-2-cyclopentenones (3) and 5-alkylidene-2-chloro-4-hydroxy-2-cyclopentenones (4) were synthesized from 4-tert-butyldimethylsilyloxy-2-cyclopentenone (5) by two different pathways. These new compounds and their synthetic intermediates strongly inhibited L1210 tumor cell growth in vitro.